www.pudn.com > source1.02.rar > Com232.cpp
#include "stdafx.h"
#include "com232.h"
BYTE XwCom=0x40;
BYTE sCom1[5],sCom2[MAXBLOCKLENGTH+12],sCom3[MAXBLOCKLENGTH+12];
BYTE opation;
short ComNum;
//COMSTAT ComStat;
CComStatus::CComStatus()
{
m_hCom = NULL;
m_bComId = (char)ComNum;//COM1
m_bByteSize=8;
m_bStopBits=ONESTOPBIT;
m_bParity=NOPARITY;
m_dwBaudRate=9600;
// m_fChEvt=1;
m_bEvtChar=EVENTCHAR;
m_fBinary=1;
m_bConnected = FALSE;
m_bFlowCtrl = FC_XONXOFF ;
m_fXonXoff = FALSE;
}
CComStatus::CComStatus(BYTE bComId,BYTE bByteSize,BYTE bStopBits,BYTE bParity,
DWORD dwBaudRate,/*WORD fChEvt,*/char bEvtChar,DWORD fBinary)
{
m_hCom = NULL;
m_bComId = bComId;
m_bByteSize=bByteSize;
m_bStopBits=bStopBits;
m_bParity=bParity;
m_dwBaudRate=dwBaudRate;
// m_fChEvt=1;
m_bEvtChar=bEvtChar;
m_fBinary=fBinary;
m_bConnected = FALSE;
m_bFlowCtrl = FC_XONXOFF ;
m_fXonXoff = FALSE;
}
BOOL CComStatus::OpenConnection()
{
char csCom[10];
COMMTIMEOUTS CommTimeOuts ;
if((m_bComId < 0) || (m_bComId > 4))
return FALSE;//从COM1到COM4
if(m_hCom)//if already open
return FALSE;
//OVERLAPPED包含异步I/O信息
m_rdos.Offset = 0;
m_rdos.OffsetHigh = 0;
m_rdos.hEvent = CreateEvent(NULL,TRUE,FALSE,NULL);
if(m_rdos.hEvent == NULL)
return FALSE;
m_wtos.Offset = 0;
m_wtos.OffsetHigh = 0;
m_wtos.hEvent = CreateEvent(NULL,TRUE,FALSE,NULL);
if(m_wtos.hEvent == NULL)
{
CloseHandle(m_rdos.hEvent);
return FALSE;
}
wsprintf(csCom,"COM%d",m_bComId);
m_hCom = CreateFile(csCom,GENERIC_READ | GENERIC_WRITE,
0,
NULL,
OPEN_EXISTING,
FILE_ATTRIBUTE_NORMAL | FILE_FLAG_OVERLAPPED,
NULL
);
if(m_hCom == INVALID_HANDLE_VALUE) {
//dwError = GetLastError();
// handle error
return FALSE;
}
else
{
// get any early notifications
SetCommMask( m_hCom, EV_RXCHAR ) ;
// setup device buffers
SetupComm( m_hCom, 4096, 4096 ) ;
// purge any information in the buffer
PurgeComm( m_hCom, PURGE_TXABORT | PURGE_RXABORT |
PURGE_TXCLEAR | PURGE_RXCLEAR ) ;
// set up for overlapped I/O
DWORD dwTemp = 1000 / (this->m_dwBaudRate / 8);
CommTimeOuts.ReadIntervalTimeout = 0xFFFFFFFF ;
CommTimeOuts.ReadTotalTimeoutMultiplier = 0;//((dwTemp > 0) ? dwTemp : 1);
CommTimeOuts.ReadTotalTimeoutConstant = 1000 ;
// CBR_9600 is approximately 1byte/ms. For our purposes, allow
// double the expected time per character for a fudge factor.
CommTimeOuts.WriteTotalTimeoutMultiplier = 2*CBR_9600/this->m_dwBaudRate;//( npTTYInfo ) ;
CommTimeOuts.WriteTotalTimeoutConstant = 0;//1000 ;
SetCommTimeouts( m_hCom, &CommTimeOuts ) ;
}
if(!SetupConnection())
{
CloseConnection();
return FALSE;
}
EscapeCommFunction( m_hCom, SETDTR );
m_bConnected = TRUE;
return TRUE;
}
BOOL CComStatus::CloseConnection()
{
if (NULL == m_hCom)
return ( TRUE ) ;
// set connected flag to FALSE
m_bConnected = FALSE;
// disable event notification and wait for thread
// to halt
SetCommMask( m_hCom, 0 ) ;
// block until thread has been halted
//while(THREADID(npTTYInfo) != 0);
// kill the focus
//KillTTYFocus( hWnd ) ;
// drop DTR
EscapeCommFunction( m_hCom, CLRDTR ) ;
// purge any outstanding reads/writes and close device handle
PurgeComm( m_hCom, PURGE_TXABORT | PURGE_RXABORT |
PURGE_TXCLEAR | PURGE_RXCLEAR ) ;
CloseHandle( m_hCom ) ;
m_hCom = NULL;
// change the selectable items in the menu
CloseHandle(m_rdos.hEvent);
CloseHandle(m_wtos.hEvent);
return ( TRUE ) ;
}
BOOL CComStatus::SetupConnection()
{
BOOL fRetVal ;
BYTE bSet ;
DCB dcb ;
if(m_hCom == NULL)
return FALSE;
dcb.DCBlength = sizeof( DCB ) ;
GetCommState( m_hCom, &dcb ) ;
dcb.BaudRate = this->m_dwBaudRate;
dcb.ByteSize = this->m_bByteSize;
dcb.Parity = this->m_bParity;
dcb.StopBits = this->m_bStopBits ;
dcb.EvtChar = this->m_bEvtChar ;
// setup hardware flow control
bSet = (BYTE) ((m_bFlowCtrl & FC_DTRDSR) != 0) ;
dcb.fOutxDsrFlow = bSet ;
if (bSet)
dcb.fDtrControl = DTR_CONTROL_HANDSHAKE ;
else
dcb.fDtrControl = DTR_CONTROL_ENABLE ;
bSet = (BYTE) ((m_bFlowCtrl & FC_RTSCTS) != 0) ;
dcb.fOutxCtsFlow = bSet ;
if (bSet)
dcb.fRtsControl = RTS_CONTROL_HANDSHAKE ;
else
dcb.fRtsControl = RTS_CONTROL_ENABLE ;
// setup software flow control
bSet = (BYTE) ((m_bFlowCtrl & FC_XONXOFF) != 0) ;
dcb.fInX = dcb.fOutX = bSet ;
dcb.XonChar = ASCII_XON ;
char xon = ASCII_XON ;
dcb.XoffChar = ASCII_XOFF ;
char xoff = ASCII_XOFF ;
dcb.XonLim = 100 ;
dcb.XoffLim = 100 ;
// other various settings
dcb.fBinary = TRUE ;
dcb.fParity = TRUE ;
fRetVal = SetCommState( m_hCom, &dcb ) ;
return ( fRetVal ) ;
} // end of SetupConnection()
BOOL CComStatus::IsConnected()
{
return m_bConnected;
}
/******************************************************************
*
* global functions
*
*******************************************************************/
/*******************************************************
function:
CommWatchProc
describ:
监视串口数据
********************************************************/
UINT CommWatchProc( LPVOID lpData )
{
DWORD dwEvtMask ;
//NPTTYINFO npTTYInfo = (NPTTYINFO) lpData ;
OVERLAPPED os ;
int nLength ;
//BYTE abIn[ MAXBLOCK + 1] ;
CComStatus * pCom = (CComStatus *)lpData;
memset( &os, 0, sizeof( OVERLAPPED ) ) ;
// create I/O event used for overlapped read
os.hEvent = CreateEvent( NULL, // no security
TRUE, // explicit reset req
FALSE, // initial event reset
NULL ) ; // no name
if (os.hEvent == NULL)
{
MessageBox( NULL, "Failed to create event for thread!", "TTY Error!",
MB_ICONEXCLAMATION | MB_OK ) ;
return ( FALSE ) ;
}
if (!SetCommMask( pCom->m_hCom, EV_RXCHAR ))
return ( FALSE ) ;
char buf[256];
while ( pCom->m_bConnected )
{
dwEvtMask = 0 ;
WaitCommEvent( pCom->m_hCom, &dwEvtMask, NULL );
if ((dwEvtMask & EV_RXCHAR) == EV_RXCHAR)
{
/* do
{*/
if ((nLength = ReadCommBlock( *pCom, (LPSTR) buf, 255 )))
{
//WriteTTYBlock( hTTYWnd, (LPSTR) abIn, nLength ) ;
buf[nLength]='\0';
AfxMessageBox(buf);
// force a paint
//UpdateWindow( hTTYWnd ) ;
}
// }
// while ( nLength > 0 ) ;
}
}
// get rid of event handle
CloseHandle( os.hEvent ) ;
// clear information in structure (kind of a "we're done flag")
// THREADID( npTTYInfo ) = 0 ;
// HTHREAD( npTTYInfo ) = NULL ;
return( TRUE ) ;
} // end of CommWatchProc()
//---------------------------------------------------------------------------
// int NEAR ReadCommBlock( HWND hWnd, LPSTR lpszBlock, int nMaxLength )
//
// Description:
// Reads a block from the COM port and stuffs it into
// the provided buffer.
//
// Parameters:
// HWND hWnd
// handle to TTY window
//
// LPSTR lpszBlock
// block used for storage
//
// int nMaxLength
// max length of block to read
//
// Win-32 Porting Issues:
// - ReadComm() has been replaced by ReadFile() in Win-32.
// - Overlapped I/O has been implemented.
//
//---------------------------------------------------------------------------
int ReadCommBlock(CComStatus& comDev,LPSTR lpszBlock, int nMaxLength )
{
BOOL fReadStat ;
COMSTAT ComStat ;
DWORD dwErrorFlags;
DWORD dwLength;
DWORD dwError;
char szError[ 10 ] ;
/*NPTTYINFO npTTYInfo ;
if (NULL == (npTTYInfo = GETNPTTYINFO( hWnd )))
return ( FALSE ) ;
*/
// only try to read number of bytes in queue
ClearCommError( comDev.m_hCom, &dwErrorFlags, &ComStat ) ;
dwLength = min( (DWORD) nMaxLength, ComStat.cbInQue ) ;
if (dwLength > 0)
{
fReadStat = ReadFile( comDev.m_hCom, lpszBlock,
dwLength, &dwLength, &(comDev.m_rdos) ) ;
/* if(WaitForSingleObject(comDev.m_rdos.hEvent,5000) == WAIT_OBJECT_0)
{
GetOverlappedResult( comDev.m_hCom ,
&(comDev.m_rdos), &dwLength, TRUE );
//lpszBlo[255] = '0';
//AfxMessageBox(buf);
}*/
if (!fReadStat)
{
if (GetLastError() == ERROR_IO_PENDING)
{
OutputDebugString("\n\rIO Pending");
// We have to wait for read to complete.
// This function will timeout according to the
// CommTimeOuts.ReadTotalTimeoutConstant variable
// Every time it times out, check for port errors
while(!GetOverlappedResult( comDev.m_hCom ,
&(comDev.m_rdos), &dwLength, TRUE ))
{
dwError = GetLastError();
if(dwError == ERROR_IO_INCOMPLETE)
// normal result if not finished
continue;
else
{
// an error occurred, try to recover
wsprintf( szError, "", dwError ) ;
//WriteTTYBlock( hWnd, szError, lstrlen( szError ) ) ;
ClearCommError( comDev.m_hCom , &dwErrorFlags, &ComStat ) ;
/*if ((dwErrorFlags > 0) && DISPLAYERRORS( npTTYInfo ))
{
wsprintf( szError, "", dwErrorFlags ) ;
WriteTTYBlock( hWnd, szError, lstrlen( szError ) ) ;
}*/
break;
}
}
}
else
{
// some other error occurred
dwLength = 0 ;
ClearCommError( comDev.m_hCom , &dwErrorFlags, &ComStat ) ;
/*if ((dwErrorFlags > 0) && DISPLAYERRORS( npTTYInfo ))
{
wsprintf( szError, "", dwErrorFlags ) ;
WriteTTYBlock( hWnd, szError, lstrlen( szError ) ) ;
}*/
}
}
}
return ( dwLength ) ;
} // end of ReadCommBlock()
//-------------------------------------------------------
//
//ReadCommBlockEx(CComStatus& comDev,LPSTR lpszBlock, int nMaxLength,DWORD dwTimeOut)
//
//---------------------------------------------------------
//---------------------------------------------------------------------------
int ReadCommBlockEx(CComStatus& comDev,LPSTR lpszBlock, int nMaxLength,DWORD dwTimeOut)
{
LPSTR lpOffset=lpszBlock;
int nReadCount = 0;
char chBuf;
//time_t beginTime,endTime;
if(!comDev.m_hCom)
return 0;
if(dwTimeOut <= 0)
return 0;
MSG msg;
//time(&beginTime);
DWORD dwLastTick,dwNowTick,dwGoneTime;
dwGoneTime = 0;
dwLastTick = GetTickCount();
dwNowTick = dwLastTick;
// double diftime;
do
{
if(PeekMessage(&msg,NULL,0,0,PM_REMOVE))
{
::TranslateMessage(&msg);
::DispatchMessage(&msg);
}
if(ReadCommBlock(comDev,&chBuf,1) > 0)
{
//TRACE("----get a char----\n");
*lpOffset = chBuf;
lpOffset ++;
nReadCount ++;
}
/*time(&endTime);
diftime = difftime(endTime,beginTime);*/
dwNowTick = GetTickCount();
if(dwNowTick < dwLastTick)
{
dwLastTick = dwNowTick;
}
dwGoneTime = dwNowTick - dwLastTick;
//TRACE("gon time = %lu\n",dwGoneTime);
}while((nReadCount < nMaxLength) && (dwGoneTime < dwTimeOut));//((diftime * 1000.0) < dwTimeOut));
return (nReadCount);
}//end ReadCommBlockEx
// BOOL NEAR WriteCommBlock( HWND hWnd, BYTE *pByte )
//
// Description:
// Writes a block of data to the COM port specified in the associated
// TTY info structure.
//
// Parameters:
// HWND hWnd
// handle to TTY window
//
// BYTE *pByte
// pointer to data to write to port
//
// Win-32 Porting Issues:
// - WriteComm() has been replaced by WriteFile() in Win-32.
// - Overlapped I/O has been implemented.
//
//---------------------------------------------------------------------------
BOOL WriteCommBlock( CComStatus& comDev, LPSTR lpByte , DWORD dwBytesToWrite)
{
BOOL fWriteStat ;
DWORD dwBytesWritten ;
// NPTTYINFO npTTYInfo ;
DWORD dwErrorFlags;
DWORD dwError;
DWORD dwBytesSent=0;
COMSTAT ComStat;
char szError[ 128 ] ;
/*
if (NULL == (npTTYInfo = GETNPTTYINFO( hWnd )))
return ( FALSE ) ;
*/
fWriteStat = WriteFile( comDev.m_hCom , lpByte, dwBytesToWrite,
&dwBytesWritten, &( comDev.m_wtos) ) ;
// Note that normally the code will not execute the following
// because the driver caches write operations. Small I/O requests
// (up to several thousand bytes) will normally be accepted
// immediately and WriteFile will return true even though an
// overlapped operation was specified
if (!fWriteStat)
{
if(GetLastError() == ERROR_IO_PENDING)
{
// We should wait for the completion of the write operation
// so we know if it worked or not
// This is only one way to do this. It might be beneficial to
// place the write operation in a separate thread
// so that blocking on completion will not negatively
// affect the responsiveness of the UI
// If the write takes too long to complete, this
// function will timeout according to the
// CommTimeOuts.WriteTotalTimeoutMultiplier variable.
// This code logs the timeout but does not retry
// the write.
while(!GetOverlappedResult( comDev.m_hCom,
&(comDev.m_wtos), &dwBytesWritten, TRUE ))
{
dwError = GetLastError();
if(dwError == ERROR_IO_INCOMPLETE)
{
// normal result if not finished
dwBytesSent += dwBytesWritten;
continue;
}
else
{
// an error occurred, try to recover
wsprintf( szError, "", dwError ) ;
//WriteTTYBlock( hWnd, szError, lstrlen( szError ) ) ;
ClearCommError( comDev.m_hCom, &dwErrorFlags, &ComStat ) ;
/*if ((dwErrorFlags > 0) && DISPLAYERRORS( npTTYInfo ))
{
wsprintf( szError, "", dwErrorFlags ) ;
WriteTTYBlock( hWnd, szError, lstrlen( szError ) ) ;
}*/
break;
}
}
dwBytesSent += dwBytesWritten;
if( dwBytesSent != dwBytesToWrite )
wsprintf(szError,"\nProbable Write Timeout: Total of %ld bytes sent", dwBytesSent);
else
wsprintf(szError,"\n%ld bytes written", dwBytesSent);
OutputDebugString(szError);
}
else
{
// some other error occurred
ClearCommError( comDev.m_hCom, &dwErrorFlags, &ComStat ) ;
/*if ((dwErrorFlags > 0) && DISPLAYERRORS( npTTYInfo ))
{
wsprintf( szError, "", dwErrorFlags ) ;
WriteTTYBlock( hWnd, szError, lstrlen( szError ) ) ;
}*/
return ( FALSE );
}
}
return ( TRUE ) ;
} // end of WriteCommBlock()
/*
extern int fileflash[100];
BOOL FAR InitComDev(HWND hWnd)
{
DCB dcb;
int x;
if(XwCom&0x10)
CommStatus.idComDev=OpenComm("COM1\0",1024,1128);
if(XwCom&0x20)
CommStatus.idComDev=OpenComm("COM2\0",1024,1128);
if(XwCom&0x40)
CommStatus.idComDev=OpenComm("COM3\0",1024,1128);
if(XwCom&0x80)
CommStatus.idComDev=OpenComm("COM4\0",1024,1128);
//if ((CommStatus.idComDev=OpenComm(InitCommParam.bPort,1024,1128))<0)
if (CommStatus.idComDev<0)
{
MessageBox (hWnd,"打开串行口错误!","错误",MB_ICONSTOP);
return (FALSE);
}
GetCommState(CommStatus.idComDev,&dcb);
dcb.BaudRate=InitCommParam.wBaudRate;
dcb.ByteSize=InitCommParam.bByteSize;
dcb.Parity=InitCommParam.bParity;
dcb.StopBits=InitCommParam.bStopBits;
dcb.fChEvt=InitCommParam.fChEvt;
dcb.EvtChar=InitCommParam.bEvtChar;
dcb.fBinary=InitCommParam.fBinary;
x=SetCommState(&dcb);
if (CommStatus.fConnected=!(x<0))
{
SetCommEventMask(CommStatus.idComDev,EV_RXFLAG);
EnableCommNotification(CommStatus.idComDev,hWnd,58,4) ;
//MAXBLOCKLENGTH,5);
ClearCommBreak(CommStatus.idComDev);
}
else
{
MessageBox (hWnd,"串行口设置错误!","错误",MB_ICONSTOP);
CloseComm(CommStatus.idComDev);
}
return(CommStatus.fConnected);
}
BOOL FAR ProcessCOMMNotification(HWND hWnd,LPARAM lParam)
{
int nError=0,x;
unsigned int nLength=0;
BYTE ch0;
COMSTAT ComStat;
x=0;
while (nError=GetCommError(CommStatus.idComDev,&ComStat));
if (ComStat.cbInQue<1)
return TRUE;
if((CN_EVENT&LOWORD(lParam))||(CN_RECEIVE&LOWORD(lParam)));
{
fileflash[11]++;
GetCommEventMask(CommStatus.idComDev,EV_RXFLAG);
if(opation==1)
{ nLength=ReadComm(CommStatus.idComDev,(LPSTR)&sCom2[0],MAXBLOCKLENGTH);
opation++;
}
else if(opation==3)
{ nLength=ReadComm(CommStatus.idComDev,(LPSTR)&sCom3[0],MAXBLOCKLENGTH);
opation=0;
}
else if(opation<0||opation>=4)
opation=0;
return(TRUE);
}
}
void SendData(BYTE option)
{
BYTE sCom1[5];
if(option==0)
strcpy(sCom1,"1100\xd");
else if(option==2)
strcpy(sCom1,"1200\xd");
else
return;
FlushComm(CommStatus.idComDev,0);
FlushComm(CommStatus.idComDev,1);
WriteComm(CommStatus.idComDev,(LPSTR)sCom1,strlen(sCom1));
}
BOOL FAR CloseConnection(HWND hWnd)
{
EnableCommNotification (CommStatus.idComDev,NULL,-1,-1);
CloseComm(CommStatus.idComDev);
CommStatus.fConnected=FALSE;
return (TRUE);
}
void tron(float *buf)
{
char b[5];
int i,j,k;
long ll;
float *netdata;
netdata=(float *)GlobalLock(downstationdata[6][3].rdata);
b[4]=0;
for(k=0;k<100;k++)
if(sCom2[k]=='A')break;
if(k==100)
{
GlobalUnlock(downstationdata[6][3].rdata);
return;
}
for(i=0;i<13;i++)
{
if(i==0||i==1)
continue;
for(j=0;j<4;j++)
b[j]=sCom2[i*4+j+1+k];
ll=0;
if(!strcmp("5555",b))
ll=0;
else
sscanf(b,"%x",&ll);
*(netdata+i-2)=(float)ll;
}
for(k=0;k<100;k++)
if(sCom3[k]=='B')break;
if(k==100)
{
GlobalUnlock(downstationdata[6][3].rdata);
return;
}
for(i=0;i<14;i++)
{
if(i==0||i==1)
continue;
for(j=0;j<4;j++)
b[j]=sCom3[i*4+j+1+k];
sscanf(b,"%f",netdata+i+11-2);
*(netdata+i+11-2)/=10;
}
GlobalUnlock(downstationdata[6][3].rdata);
}
*/